[coreboot] brick avoidance

Anders Jenbo wrote:
> Just a hint, they don't have to be the same model or even brand.
But make sure that they are compatible. You mentioned that you have
8Mb LPC flash, so some candidates would be:
SST49LF080
Winbond W39V080A (NOTE! not 080FA, which is incompatible)
PMC Pm49FL004T (yes, only 4 Mbit)
Nothing with Intel brand, they are all incompatible.
//Peter